Currently building with Trivselhus. Their solution was to use about 20 pieces of 1 mm galvanized/angled plates that were nailed into the concrete, and when the wall was in place, 2 screws/plate were fastened to the edge of the sill.
Apparently, no heavy-duty fittings are needed to keep the house in place.
Apparently, no heavy-duty fittings are needed to keep the house in place.